I Have And Having Significant Job Pain Feeling Dizzy And

I have and having significant job pain feeling dizzy and a headache. Pain going down my neck and my shoulder on my left side. EKG was normal. I am wondering can I still have circulation her heart issues? I am a 70-year-old female. I exercise regularly and was on the treadmill a week ago and had my heart rate up to 120.
I weigh 128. And I am basically in good health.